The deadliest inter-state war in Latin American history, resulting in massive Paraguayan casualties and territorial cessions to Argentina and Brazil.
Key Facts
- Duration
- 1864 to 1870 (approximately 6 years)
- Belligerents
- Paraguay vs. Argentina, Brazil, and Uruguay
- End of guerrilla war
- 1 March 1870, Battle of Cerro Corá
- Occupation duration
- Argentine and Brazilian troops occupied Paraguay until 1876
- Guerrilla phase length
- 14 months
- Historical distinction
- Deadliest inter-state war in Latin American history
By the Numbers
Location
Cause → Event → Consequence
The war originated from tensions between Paraguay and Brazil stemming from the Uruguayan War in late 1864. Brazil's military intervention in Uruguay prompted Paraguay's president Francisco Solano López to oppose Brazilian actions, leading Paraguay to declare war on Brazil and subsequently on Argentina, which had allowed Brazilian troop transit through its territory.
Paraguay fought the combined forces of Argentina, the Empire of Brazil, and Uruguay in a prolonged conflict lasting from 1864 to 1870. After suffering defeat in conventional warfare, Paraguay resorted to guerrilla resistance for 14 months until López was killed at the Battle of Cerro Corá on 1 March 1870, ending organized Paraguayan resistance.
Paraguay sustained catastrophic losses in both military personnel and civilian population through battle, famine, and disease. The country was compelled to cede disputed territories to Argentina and Brazil. Argentine and Brazilian forces occupied Paraguay until 1876, leaving the nation severely depopulated and economically devastated for decades.
Belligerents & Mobilization Analysis
Side A
1 belligerent
Francisco Solano López.
Side B
3 belligerents